Door-latch



G. H. ELWEL'L.I

DOOR LATCH.

APPLlcATloN FILED AuG.5,-19la.`

1,356,612. Patented Oct-'26, 19204..-

2 SHEETS-SHEET I.

J Yi WxvNesse-s Se, MMOR Q, www

G. H. ELWELL.

DOOR LATCH.

APPLICATION FILED AUG.5, 191s.

1,356,61 2, Patented Oct. 26, 1920.

2 SHEETS-SHEET 2.

WITNESS ES'.

lINVENTOR Q wf/ MED STATES PATENT OFFICE@ f GEORGE HENRY ELwErr., or DETROIEMICHIGAN, AssIeNoR To CHESTER r. HARD'ON,

Y TRUSTEE, oEBRooKLrNE, MASSACHUSETTS. f

DOOR-LATCH.

To all fav/0m it may concern.'

Be it known that I, GEORGE HENRY EL-A wELL, a citizen of the United States, residing at Detroit, in `the county of Wayne and State of Michigan, but formerly of Boston,

in the county of Suffolk and State of Mas-` sachusetts, have invented certain new and useful improvements in IDoor-Latches, of

which the following is a specification.

My invention relates to improvements'in door latches and more particularly to that class of latches employingav bolt with Va hook-shaped head for positive interlocking engagement with the striker-plate.

4The objects of my invention are to provide a latch bolt fully adapted to the elasticity of motor car bodies and like uses;l to provide a positive lock insuring safety to occupants of the car employing it; to provide a latch in itself anti-rattle, without'the assistance of rubber bumps on' the door stops;

and to provide a latch, the closing action ofV of the Construction can be `made without departing from the spirit or modifying any of the advantages of the invention.

The following is the description of an embodiment of my invention, reference being had to the accompanying drawings:

In'the accompanymg drawings, Figure 1'y is an upright view of the mechanism .of the device;

Fig. 2 is a bottom view of figure;

Fig. 3 is a face view of the preceding figure;

the preceding Fig. 4 is an upright view of the mecha` nism, with double controla; l

Fig. 5 is top view of the preceding figure ;y Fig. 6 is a face view of the preceding figure' f Fig. 7 is a back view of thepreceding figure;

Specification-of Letters Patent.

. figure;

engaging conveyer 10 and the rearward end Patented 06h26, 1920."

'l Application led August 5, 1918. LSerial No. 248,402.

-F ig. 8 is an upright view vof the mecha? nisln adapted for lever cam control; j F 1g. 9 is a bottom view of the preceding FigQlO is a face view of the precedingfigure; v

Fig. ll is an end view and a face view of striker-plate; and v Fig. 12 is a face view and an end' view of a vmodified striker-plate. 1 vReferring more particularly to the draw- 1ngs,- f

A supporting plate or incasement 1 is provided with a face 2 having a perforation 3, said incasement 1 being also provided with a back 4 having a passage 5,' said face 2 withv its perforation 3 and back 4 with-A its passage 5. providing forward and rear passageway'for bolt 6` and said face 2 with its perforation 3 reinforced bystrap or cover 7 providing guiding bearings for said bolt 6 sliding in its passageway, as shown by Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. They bolt 6is provided with a double beveled head 8 for engaging the striker-plate 26 both upon entering and leaving said striker-plate 26, said bolt head 8 forming a rigid hook, and said bolt 6 is also provided with an auX- iliary; bolt member 9 carried by said bolt 6, as shown in Figs. l, 2, 3,'4, 5,6, '8, 9, and 10. The incasement 1 is also/provided with a movable conveyer 10 .maintained in its nor-` V mal forward position in the passageway ofv said bolt 6 yby means of springll and arrested in its forward movement by check 12 with which incasement 1 isv provided, the

rearward tension of said spring 11 being held in check by back 4 of said incasementl. 1 Said bolt 6 is provided with shoulders 13 and 14 of said spring 11, respectively, vso thatsaid conveyer 10 and said springrll when they are in their normal `positions are lying between and engaging said shoulders 13 and 14 of said bolt 6. Washer -15 may be placed 100` betweensaid spring 11 and said shoulders 14,a's shown in Figs. 1, 2A, 4, 5, `8, and 9.

Said auxiliary bolt 9 is held in `its normal position by spring 16jwith which said Vbolt f y. A6 is provided, the rearward end of said 105 spring 16 engaging said shoulders 13 of said bolt 6 and exerting its tension in a 'forward Y direction againstyoked end 17 of said auxiliary bolt 9, as shown in Figsl, 2, 4, y5, 8,

- and 9; Lever 18 may be pivoted to said bolt 110 6 to operate said auxiliary bolt 9 againstthe tension of said spring 16, as shownin Figs.

1- and 2. If desired, said lever 18 may be pivoted to said incasement: 1to operate'said eonveyer 10 against the tension of said spring 11, as shown in Figs. 4 and 5,. A cam 19 may be pivoted to said lever 18 and onev end of said camf19 made to engage and opera-te said conveyer 10 upon therearward movement of saidlever 18 and an engagement of the opposite end of said cam 19 with a shoulder 2O lwith which said. incasement 1 is provided,'as shown in Figs. 8, 9, and 10. Vvhen the said lever 18 is pivoted to said incasement 1, said check 12 with which said incasement 1is provided is made to arrest the movement of said lever 18 and then said `lever 18 arrests the forward movement of said conveyer .10, asV shown kin `Figs. 4 and 9. When said lever 18, either by direct engagement or by means of said cam 19 is made to operate said Conveyer 10, said`conyoke end 17 of said auxiliary bolt 9 upon a sufficient operation of said conveyer 10, as shown in Figs. 5 and 9. If desired, the said forward arm of conveyer 10 may be made to lie and operate in a slot 22 with which incasement 1 may be provided, as shown in Figs. 8 and 9. An operating rod 23 may be pivoted to said lever 18 when said lever 18 Y is bent to provide for either a lift-up operation or a push-down operation, as-shown inFigs. 1 and 4, respectively. A wingf'24 with which conveyer 10 may be provided may provide the means bywhich said conveyer 10 may beoperated independently strap 7 is made tocover the entire bolt pas-l from the movement of said lever 18, vsaid wing 24 being operatively engaged by spindle cam25, as shown by Fig. 4. lVhen said sage as shown Ain Fig. 4 back 29 may be provided by said strap 7 to take .the place of back 4 provided by said incasement- 1, as shown. in Fig. 7. Astriker-plate 26 is provided with perforation 27 to receive said bolt head 8 carrying said auxiliary bolt 9. Vhen saidA auxiliary bolt 9y is carried externally. by said bolt head 8 said striker-plate 26 isprovided with a bumper section 28, as shown in Figs. 2 and 11. But when said 'auxiliary .bolt 9 lies and is Ycarried in a groove with which said bolt head 8 is pro- .vided saidbumper section 28i's omitted, ask

,shown in Figs..4,-15, and 12.

In operation the closing bevel of head 8Y Vengages striker-plate 26 and compresses bolt 6 `against the tension of spring 11 andas the door `is swungl to a closed position bolt headV 8.- obliquely enters perforation 27 of striker-plate26 and auxiliary bolt 9 engagingvthe portion of said striker -plate 26v bounding said perforation 27Y is thereby compressed against the'tension of spring 16 topermit the entrance; ofsaiid head 8 into said striker perforation 27, and the rigid hook portion of said head 8 to'take its in 27 in said striker-plate 26, as shown in Y Fig. 2. ,Y

When the head of said auxiliary bolt 9is slightly beveled, as shown in Fig. 5, at 30 said bolt 9 does not necessarily resume its full normalA position upon entering said perforation 27, but wedges itself into said perforation 27 between the opening bevel of bolt head 8 and the bounding surface of said perforation 27, thus being adapted to take up variances occuring in manufacture andalso providing for slight wear. Y

l/Vhen interlocked with said striker-plate 26, bolt head 8 may be extended in any circumstances that may tend to increase the distance between the striker-plate 26 and bolt 6 compressing spring 11 in a forwardly direction, said spring 11 being held 'at its opposite end by conveyer 10 arrested in its forward movement by check 12, as shown in Figs. 2 and 9, or by lever 18 as shown inV Figs. 4 and 8. ,I y.

The interlocking engagement betweenbolt 6 and striker-plate i26inay` be released by lever 18 opera-tively engaging and operating said auxiliary bolt 9, as shown in Figs. 1 and 2, or lever^18inay operate oonveyer'10, consecutively compressing spring 11 and operating said auxiliary bolt 9, as shown in Figs. 4, 5, 8, and 9. Any means'of operat- V ing said levei 168 may be employed, but when Y be made to operate said conveyer 10 theV y maximum distance with the minimum rear; ward movement of said lever 18.

` Vhen auxiliary bolt 9 iswithdrawn from said perforation. 27 in 'striker-plate y26, in

. the manner above described,the door may be swung open, the opening bevelt of said -face 2 of lock incasement 1, shoulderllfof bolt head 8 Vengaging the bounding surface i `of said perforation27, compressing said bolt 6 as in closing. Whensaid conveyer 10 is operated by lever 18, the tension ofv said spring 11 is wholly removed from: said bolt 6 before shoulder 21 of said conveyer'10 engages and operates said 1auxiliary bolt 9, thus insuring an easy opening swing of thek door as the opening bevel of vsaid bolt head 8 in its engagement with the bounding surface of said perforation 27 meets no spring tension resistance.

AS Win be evident to these Skiiieain ai@V mounting said bolt to normally project from said incasement; spring means permitting said latch bolt to be moved in either directiony from a normal .intermediate .position and adapted to return said .latch bolt to said intermediateposition; and means toretire said bolt from said interlocking engagement. Y l

2. A door latch comprising a proper ineasement; a) latch bolt provided with a rigid hook-shaped head for interlocking engagement with a striker-plate and carrying av yieldingauxiliary bolt member; rigid guiding bearings Vwith which said incasement is provided for slidably mounting said bolt to normally project from said incasement; spring means to advance` and maintain said latch bolt and said auxiliary bolt in their normal latching positions; and manually operative means for operating said auxiliary bolt and said latch bolt.

3. VA door latch comprising a proper incasement; a latch bolt provided with av beveled head formingV a rigid hook; rigid guiding bearings with whichv said incasement is provided for slidably mounting said bolt to normally project from said incasement; spring means permitting Asaid latch holt to be moved in either direction fromfa normal intermediate Lposition and adapted to return said latch bolt to said intermediate position; and meansv to retire said bolt 'v head within said incasement.

4. A door latch comprising a proper incasement, said incasement being provided with a bolt passage'. extending through, the

face of said incasement; spring meansv mounted in said passage and lexerting its tension in orwardand rearward directions;

means with which said incaseinent is provided witliin said bolt passage'to arrest in -both directions'the tension of said spring means; a latch bolt provided with a beveled head forming a rigid hook Jfor interlocking engagement with a striker-plate, said bolt being slidably mounted within said bolt passage; shoulders with which ,said latch bolt provided normally engaging the 'tension in 'both directions or" said spring means g: and manually operative means to retire said bolt heady from saidA interlocking engagement and within said incasement.

5. kA door latch comprising a proper inc'asement; a latch bolt having al rigid hookshaped head for positive engagement with a striker-plate; an auxiliary bolt carried by auxiliary bolt being slidablymounted with- Y in said incasement and capable of being advanced together through a perforation with which the face of said incasement -is pro- '70 said latch bolt head, said latch boltand said V vided; spring means with which said auxili-v ary bolt is provided; spring means to adi Vance and maintain said latch bolt in rrits normal latchingposition; and manually operative means for operating said'anxiliary bolt and said latch bolt against their respective spring means.

-6. A door latch-.comprising a properineasement; a latch bolt having a rigid hook-v shaped double beveledfhead; anr auxiliary bolt carried by said latchbolt head; spring means against the tensionr of Ywhich the auxiliary .bolt is capable of being compressed independently from the compression 1 of said latchfbolt; spring means permitting said latch bolt to be moved in either forward or rearward direction from a normal j intermediate position and-adapted to return said latch bolt to said intermediate position; and manually operative means for operating said auxiliary bolt. 'i

7. yA door holdingmeans comprising a striker-plate having means fory attachment to a door-frame; a latchmechanism having means for attachment to a door and comprising a proper incasement; a beveled `head latch bolt slidably mounted within said incasement and being capable of advancing from within said inca-sement; spring means with which said bolt is provided to advance and maintain saidbolt in anextended position greater than normal latching position; and manually operative means to retire said bolt within said incasement andto return said bolt to a normal latching position;

ios

iio

whereby 'said bolt isv adapted' to rest in a i normal latching position whenfthe door vis in an open position;and whereby said bolt vis adapted to maintain a fixed engagementv with the striker-plate under allv fluctuating relative positions of the 'door' `and doorframe when the Vdoor is in its closed position. .l

8. A door holding means comprising a striker-plate anda latch mechanism having two section hook-shaped head latch bolt norhead of said latch boltin normal position being of greater diameter than the bolt head izo Y -a proper incasement and provided withja l lmally projecting from and slidably mounted within Vsaid incaseinent, said two section v `passage provided by saidl striker-plate, and one of said bolt head'sectionsV yieldingto 4t being provided with shoulders that normally engagements of said bolt head sections; and

- whereby said interlocking engagement may ltermediate position ;'and manually operative Y lproper incasement,said incasement; being providedwith abolt passage extending be released only by the separate Vyieldingy of one of said bolt head sections; and whereby vthe latch bolt while interlockedawith said striker-plateV may be extended beyond nor-v mal latching position.

9. An anti-rattle safety extension bolt door holding means comprising a strikers plate and a latch mechanism comprising a proper incasement, said incasement having a face provided with a perforation, saidperforation being reinforced by a strap providing bolt guiding bearings; a latch bolt having a double beveled head, said head forming arigid hook; an auxiliary bolt carried by said latch bolt head, said latch bolt being slidably mounted in the bolt passageprovided by said incasement and capable of advancing through said reinforced perforation` to and beyond normal latching position; spring means exerting its tension'against saidy auxiliary bolt and against a shoulder with which saidlatch ,bolt is provided; spring means exerting its tension in a forwardly direction against a conveyer mounted v in said latch bolt passage and arrested in its forward movement by a check with which said incasement is provided and normally in a rearwardly direction against a back provided by said incasement7 said latch bolt engage the forward surface of said conveyer andthe rearward extremity of-said spring means, said springmeans permitting said latch bolt to be moved in either direction from a normal 'intermediate position and adapted to return said latchbolt to said inmeans to ietire said auxiliary boltwithin said incasement, said means comprising a lever pivoted to said latch bolt and opera- Y tively engaging said auxiliary bolt.

l0. An anti-rattle safety lextension boltdoor holding means comprising a` strikerplate and-a latch mechanism comprisinga through the facerof said. incasement; a latch bolt having a doublebeveled head, said headforming a rigid hook; an auxiliary bolt carried'by Said nach boit head, SaaiV nach boit being slidably mounted in said bolt passage and normally projecting from said-'face of' said incasement to normal latching position; spring means to maintain said auxiliary bolt in its normal position; spring means to advance and maintain said latch bolt in its normal latching position, said spring means permitting said latch bolt'to be moved inl either forward or rearward direction from a normal intermediate position andl adapted to returnsaid latch bolt to said intermediate position; and manually operative means for rearwardly compressing said spring means of said latch bolt and operating said auxilia bolt said o erative means com orisino' a vertical lever pivoted'to the lowerportion of said incasement,- said lever beingy pro-l vided with a cam lever pivotedto said vertical lever, the upper portion of' said lcam lever engaging a'shoulder with which said incasement is provided and the lower'portion of saidcam lever engaging a' conveyer holding the forward extremity ofv said'latch bolt spring means, said conveyerhaving a forward arm for engagement with said auxiliary bolt when said conveyer is suiiciently operated; whereby said .vertical Vlever isl adapted to be swung rearwardly, causing the cam lever to operate said conveyer and compress said latch bolt-spring means the maximum distance for the-minimum movement of said vertical lever, thus rst removing the spring tension from said latch bolt and then operating said auxiliary bolt.

1l. YAn anti-rattle safety extensionr bolt Y door holding means comprising a strikerplate and a latch mechanism comprising a proper incasement, said incasement being provided with a bolt Apassage Vextending v through .the face of said incasement; a latch bolt having closing and opening bevels with which the head of said latch bolt is provided,

said head forminga rigid hook; an auxiliary bolt having a slightly beveled head and being' slidably seated in a groove in the openingV bevel side of said latch bolt head by which"v .said auxiliary bolt is carried, said latch bolt being slidably mounted within said bolt passage and normallyprojecting from the said face -ofv said incasementl to normallatching position; spring means to maintain said auxiliary bolt in its normal forward position; i

springmeans to vadvance and maintain said latch bolt. in its normal latching position, said spring means permitting said latchbolt to be movedgineither forward or rearward direction vfrom anormal intermediate Aposition and adapted to return said latch bolt to said intermediateV position; and Vmanually operative means for rearwardly'compressing Ysaid latch bolt spring means and. operating said auxiliarybolt; whereby said latch bolt is adapted to be compressed against its spring means upon an engagement Vof said closing bevel with said Vstriker-plate and :tace of said striker-plate when the beveled head of said auxiliary bolt wedges into said Striker-plate passage between the opening bevel of said latch bolt head and the surface of said striker-plate bounding said passage; and whereby said latch bolt is adapted to be easily compressed upon an engagement of said opening lbevel with said strikerfplate when said spring tension is rst removed and said auxiliary bolt withdrawn from its 15 wedged engagement in said striker-plate ypassage' by said manually operated means.

In testimony whereof I have aixed my signature in presence of two witnesses. o

GEORGE HENRY ELwELL. f

' ,Witnessesz v LUETTA F. LINCOLN, MARGARET A. SMITH. 

